Haustafel "Hier spricht die NSDAP" Enamel Sign

[tobi]

Hey guys,

i just got offered this sign, found in an old house.
This is not my focus in collecting, but a nice piece to have.

What do you think about it? Red color on the backside, maybe painted pre ww2? Let me know your thoughts, thank you very much!

Pictures are from the seller.

Regards,
Tobi